[← Rail service providers in Arkansas](https://rebulk.com/rail-service-providers/arkansas)

# Union Pacific Railroad

North Little Rock, AR

[Component repair shop](https://rebulk.com/rail-service-providers/type/component-repair) [Truck and bogie shop](https://rebulk.com/rail-service-providers/type/truck-and-bogie) [Wheel and axle shop](https://rebulk.com/rail-service-providers/type/wheel-and-axle)

## Certification

AAR M-1003

shop code UPAR · registry expiry 2027-11-06

A facility listed in the AAR registry is certified even if its printed expiration date has passed; renewals are sometimes delayed for reasons outside the facility's control. Source: [AAR M-1003 registry](https://aar.iirx.net/Registries/M1003), read 2026-09-20.

## Work performed

Wheels and trucks

Bearing service, Truck rebuild, Wheelset assembly

Structural

Bolster repair

Locomotives

Diesel engine service, Locomotive electrical, Traction motor service

Company website

[https://up.com/](https://up.com/)

## Other facilities in Arkansas

| Facility | City | Certification | Work performed |
| --- | --- | --- | --- |
| [Transitech, Inc.](https://rebulk.com/rail-service-providers/arkansas/transitech-inc) Fordyce Railcar coating and lining shop · Tank car service facility | Fordyce | AAR M-1002AAR M-1003 | Coating, Interior lining, Leak testing, Railcar repair +3 |
| [Trinity Rail - Jonesboro (Plant 034)](https://rebulk.com/rail-service-providers/arkansas/trinity-rail-jonesboro-plant-034) Railcar coating and lining shop · Railcar repair shop · Tank car service facility | Jonesboro | AAR M-1002AAR M-1003 | Coating, Heavy rebuild, Interior lining, Leak testing +4 |
| [Granite Mountain Quarries - Little Rock (Plant 1)](https://rebulk.com/rail-service-providers/arkansas/granite-mountain-quarries-little-rock-plant-1) | Little Rock | AAR M-1003 | — |
| [Martin Marietta](https://rebulk.com/rail-service-providers/arkansas/martin-marietta) Malvern | Malvern | AAR M-1003 | — |
| [Greenbrier](https://rebulk.com/rail-service-providers/arkansas/greenbrier) Marmaduke Rail parts supplier · Railcar coating and lining shop · Railcar repair shop · Tank car service facility | Marmaduke | AAR M-1002AAR M-1003 | Coating, Heavy rebuild, Interior lining, Leak testing +4 |
| [Arkansas Steel Associates, LLC](https://rebulk.com/rail-service-providers/arkansas/arkansas-steel-associates-llc) | Newport | AAR M-1003 | — |
| [Southwest Steel Processing, LLC.](https://rebulk.com/rail-service-providers/arkansas/southwest-steel-processing-llc) Rail parts supplier | Newport | AAR M-1003 | — |
| [Gerdau Long Steel North America - Paragould Rail Products](https://rebulk.com/rail-service-providers/arkansas/gerdau-long-steel-north-america-paragould-rail-products) | Paragould | AAR M-1003 | — |

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Source: https://rebulk.com/rail-service-providers/arkansas/union-pacific-railroad